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Sometimes, when I reboot the dirty way, I get a menu (black screen, grey letters) .

This is asking to choose what/how I want to launch Ubuntu (very sorry I dont remind which modes).

How is it possible to disable it ? cause the computer has no screen and I dont want boot to be stopped by this screen.

3pic
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    possible duplicate of [How to disable Grub's menu from showing up after failed boot](http://askubuntu.com/questions/178091/how-to-disable-grubs-menu-from-showing-up-after-failed-boot) – Byte Commander Sep 14 '15 at 09:58
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    Simple solution: Do not hard reboot. Advanced solution: see linked question above. – Byte Commander Sep 14 '15 at 09:59
  • @ByteCommander : thank you but... without screen, users do hard reboot to shut down. Unless a better way is possible (w/o screen) ? – 3pic Sep 14 '15 at 10:02
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    You have a keyboard? I guess without monitor it's a server release without GUI. Can't you configure it to shutdown if you only touch the power button (ACPI settings or something like that) instead of hard-shutdown? Or you could at least use the magic kernel commands (ALT+SYSRQ+R, then +E, +I, +S, +U and +B, waiting a short time for each command to complete.) – Byte Commander Sep 14 '15 at 10:09
  • Another possibility is to remote login (I use PuTTY for that) and to start the command `reboot` – Marc Vanhoomissen Sep 14 '15 at 10:37
  • no keyboard, no screen, no login, ... nothing but the on/off button. – 3pic Sep 14 '15 at 12:03
  • I guess there is at least a LAN connection, otherwise I do not understand what your PC can do nor how you can control/manage it. If you have a LAN connection, then it must be possible to remotely log on to that machine. – Marc Vanhoomissen Sep 14 '15 at 13:05

1 Answers1

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You need to change the grub boot settings..

sudo -H gedit /etc/default/grub

you need to change this line:

GRUB_HIDDEN_TIMEOUT_QUIET=false

to

GRUB_HIDDEN_TIMEOUT_QUIET=true

save configuration file and update grub:

sudo update-grub

There are also some grub setting applications that can help you with this using a gui.

Zanna
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Maokei
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